CN102929083B - The method of adjustment of projection arrangement and color wheel delay time thereof - Google Patents
The method of adjustment of projection arrangement and color wheel delay time thereof Download PDFInfo
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- CN102929083B CN102929083B CN201110229783.7A CN201110229783A CN102929083B CN 102929083 B CN102929083 B CN 102929083B CN 201110229783 A CN201110229783 A CN 201110229783A CN 102929083 B CN102929083 B CN 102929083B
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Abstract
The invention provides the method for adjustment of a kind of projection arrangement and color wheel delay time thereof.This projection arrangement comprises light source, colour wheel, the first probe unit, light-modulating cell and the second probe unit.The assorted section of colour wheel in turn and be periodically arranged at light source go out on light path, with the light pulse making the look section of the predetermined color of colour wheel produce predetermined color under the effect of light source.The position of the first probe unit detection colour wheel, and produce the multiple synchronizing pulses identical with the colour wheel period of motion.Light-modulating cell obtains picture signal, produces and organizes modulating pulse more, and modulate according to this many groups modulating pulse light pulse to predetermined color according to picture signal, multiple synchronizing pulse and multiple candidate's color wheel delay time.Second probe unit detects the luminous flux of the light pulse after light-modulating cell modulation respectively.Light-modulating cell determines best colour wheel time delay according to luminous flux.By the way, robotization the adjustment of color wheel delay time can be realized.
Description
Technical field
The present invention relates to projection art, particularly relate to the method for adjustment of a kind of projection arrangement and color wheel delay time thereof.
Background technology
At present, projection arrangement is widely used in the various application scenarios such as film broadcasting, meeting and publicity.As everyone knows, in the use of projection arrangement, colour wheel and light-modulating cell need to carry out synchronous.Be generally by probe unit, the mark be arranged in colour wheel or colour wheel CD-ROM drive motor is detected, and produce a synchronizing pulse at every turn after detecting this mark, and then periodically produce the multiple synchronizing pulses identical with the colour wheel period of motion.Light-modulating cell then carries out corresponding modulation to the colorama pulse that colour wheel produces after receiving this synchronizing pulse.But this detection method invariably cannot exist error, therefore need to correct to this synchronizing pulse the precise synchronization that (delay) could realize colour wheel and light-modulating cell.The time delay that this trimming process uses is called as the color wheel delay time.
For the projection arrangement completing assembling, its color wheel delay time, once determine, is changed with regard to not needing again.But, due to the impact of colour wheel or the factor such as the shift in position of light source and the performance change of detector, synchronous colour wheel and light-modulating cell may be caused again to occur asynchronous.Now, need to adjust time delay colour wheel, to make colour wheel and light-modulating cell re-synchronization.In the prior art, the adjustment of this color wheel delay time completes manually, the problem such as therefore there is time-consuming, effort and Adjustment precision is poor.
Along with the competition of projection arrangement industry is day by day violent, manufacturer improves projection arrangement quality one after another, and then promotes the competitive power of self.The present inventor finds in the process of actively seeking for a long time to improve projection arrangement quality, and in prior art, projection arrangement ubiquity cannot the technical matters of robotization adjustment color wheel delay time.
Therefore, need the method for adjustment that a kind of projection arrangement and color wheel delay time thereof are provided, cannot the technical matters of robotization adjustment color wheel delay time with what solve projection arrangement in prior art.
Summary of the invention
The technical matters that the present invention mainly solves is to provide the method for adjustment of a kind of projection arrangement and color wheel delay time thereof, with the color wheel delay time of robotization adjustment projection arrangement.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: provide a kind of projection arrangement, comprise light source, colour wheel, the first probe unit, light-modulating cell and the second probe unit.Light source has one and goes out light path.Colour wheel comprises at least two look sections, and assorted section in turn and be periodically arranged at out on light path, with the light pulse making the look section of the predetermined color of colour wheel produce predetermined color under the effect of light source.The position of the first probe unit detection colour wheel, and produce the multiple synchronizing pulses identical with the colour wheel period of motion.Light-modulating cell obtains picture signal, produces and organizes modulating pulse more, and modulate the light pulse of predetermined color respectively according to the modulating pulse of many groups according to picture signal, multiple synchronizing pulse and multiple candidate's color wheel delay time.Picture signal is the signal of the light pulse display predetermined image that can utilize predetermined color.Second probe unit detects the luminous flux of the light pulse of the predetermined color after light-modulating cell modulation respectively.Light-modulating cell determines best colour wheel time delay according to luminous flux further.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: the method for adjustment providing a kind of color wheel delay time of projection arrangement, comprise: at least two the look sections controlling colour wheel in turn and be periodically arranged at light source go out on light path, and detect the position of colour wheel, to produce the multiple synchronizing pulses identical with the colour wheel period of motion, and the look section controlling the predetermined color of colour wheel produces the light pulse of predetermined color under the effect of light source; Show the picture signal of predetermined image, multiple synchronizing pulse and the generation of multiple candidate's color wheel delay time according to the light pulse of predetermined color can be utilized and organize modulating pulse more, respectively the light pulse of predetermined color is modulated according to the modulating pulse of many groups, and detect the luminous flux of light pulse of the predetermined color after modulation respectively, and determine best colour wheel time delay according to luminous flux.
The invention has the beneficial effects as follows: the situation being different from prior art, the method of adjustment of projection arrangement of the present invention and color wheel delay time thereof produced according to picture signal, multiple synchronizing pulse and multiple candidate's color wheel delay time organizes modulating pulse more, modulate according to the light pulse of many group modulating pulses to predetermined color, and detect the luminous flux of the light pulse of this predetermined color respectively, and determine best colour wheel time delay according to the luminous flux detected.Therefore, projection arrangement of the present invention and color wheel delay time adjusting method thereof can realize in robotization, and have save time, laborsaving and Adjustment precision advantages of higher.
Accompanying drawing explanation
Fig. 1 is the structural representation of a preferred embodiment of projection arrangement of the present invention;
Fig. 2 is the sequential chart of the various signals of the projection arrangement shown in Fig. 1;
Fig. 3 is the process flow diagram of a preferred embodiment of the method for adjustment of the color wheel delay time of projection arrangement of the present invention;
Fig. 4 is the process flow diagram of the concrete methods of realizing of the step S02 of the method for adjustment of the color wheel delay time shown in Fig. 3.
Embodiment
Refer to Fig. 1, Fig. 1 is the structural representation of a preferred embodiment of projection arrangement of the present invention.As shown in Figure 1, projection arrangement 10 of the present invention mainly comprises light source 11, shaping lens 12, colour wheel 13, first probe unit 14, relay lens 15, prism 16, light-modulating cell 17, second probe unit 18 and camera lens 19.
Light source 11 has one and goes out light path, and can produce and go out the illumination light of propagate along this.The illumination light that light source 11 produces preferably incides on colour wheel 13 after shaping lens 12 or other optical element shapings.
Colour wheel 13 comprises at least two look sections.When in the look section that the illumination light after shaping incides a certain color, this look section can produce the light of corresponding color.In the present embodiment, light source 11 is semiconductor LASER Light Source, and it can produce an exciting light, such as blue light or ultraviolet light.At least part of look section of colour wheel 13 is provided with material for transformation of wave length, such as fluorescent material or nano material.This exciting light can be converted to the Stimulated Light of respective color by this material for transformation of wave length.Certainly, part look section also can not arrange material for transformation of wave length, but direct transmission exciting light.Such as, when exciting light is blue light, part look section can direct transmit blue.
Further, these at least two the look sections on colour wheel 13 can under the effect of motor (not shown) or other driving mechanisms in turn and be periodically arranged at the going out on light path of light source 11.In the present embodiment, colour wheel 13 can around a rotating shaft periodic rotary, and then makes the assorted section of colour wheel 13 in turn and be periodically arranged at the going out on light path of light source 11.In other embodiments, colour wheel 13 can also take other designs, such as rotary drum and moving belt disclosed in Chinese patent CN200910105822.5.
Colour wheel 13 assorted section in turn and be periodically arranged at light source 11 go out in the process of light path, the position of the first probe unit 14 pairs of colour wheels 13 detects, and produces multiple synchronizing pulses as shown in Figure 2.Such as, the first probe unit 14 can detect the mark be attached in colour wheel 13 or CD-ROM drive motor rotating shaft, and produces a synchronizing pulse after detecting this mark at every turn, and then produces multiple synchronizing pulse.The cycle of the plurality of synchronizing pulse is identical with the running period of colour wheel 13.
In order to realize the object of robotization of the present invention adjustment color wheel delay time, the synchronizing pulse that the first probe unit 14 produces is input to light source 11, with the multiple light pulses making the look section of the predetermined color of colour wheel 12 produce predetermined color under the effect of light source 11.The cycle of the plurality of light pulse is also identical with the running period of colour wheel 13.In the present embodiment, light source 11 produces an illumination light pulse when the look section of this predetermined color according to synchronizing pulse determination colour wheel 13 is arranged at going out on light path of light source 11, with the light pulse making this illumination light pulse form predetermined color after the look section effect of this predetermined color, and then be periodically arranged at the multiple light pulses in the process of light path to produce predetermined color of light source 11 in the look section of this predetermined color.
In the present embodiment, because light source 11 is semiconductor laser light resource, it has the function of High Speed Modulation, therefore can switch or adjustment brightness rapidly in time.Therefore, the present embodiment produces illumination light pulse by the opening and closing controlling light source 11.Wherein, there is the first fixed delay time between the time going out light path that the look section of light source 11 time and this predetermined color of receiving synchronizing pulse moves into light source 11.This first fixed delay time can be stored in first storage unit (not shown) of light source 11.Meanwhile, there is the second fixed delay time between the time going out light path that the look section of time and this predetermined color that light source 11 receives synchronizing pulse shifts out light source 11, and be stored in this first storage unit equally.First fixed delay time and the second fixed delay time can be determined by the rotating speed of the position of the look section of this predetermined color, angle and colour wheel 13, and obtain by calculating.Therefore, according to the first fixed delay time of this first memory cell storage and the second fixed delay time, light source 11 determines that the look section of this predetermined color moves into and shifts out the time light path of light source 11 after receiving synchronizing pulse, and this predetermined color look section move into light source 11 go out light path time open, the look section of this predetermined color shift out light source 11 go out light path time close.Thus, when the look section of this predetermined color is arranged at going out on light path of light source 11, light source 11 just produces an illumination light pulse, and this illumination light pulse becomes the light pulse of a predetermined color through the look section wavelength convert of this predetermined color, and then form multiple light pulses of predetermined color as shown in Figure 2.
In a preferred embodiment, light source 11 the look section of this predetermined color cover completely light source 11 go out light path time open, and the look section part of this predetermined color shift out light source 11 go out light path time close, the hot spot that the illumination light pulse making light source 11 produce thus produces on colour wheel 13 acts in the look section of this predetermined color completely, avoids other color of light that this hot spot produces when being applied to the look section of other colors to the impact of adjustment result.
In other embodiments, the emitting brightness of light source 11 can be adjusted according to synchronizing pulse, emitting brightness when being arranged at going out on light path of light source 11 with the look section making the emitting brightness of the light source 11 when the look section of this predetermined color is arranged at going out on light path of light source 11 obviously be different from other colors, and then produce above-mentioned illumination light pulse equally.
In the present embodiment, the predetermined color of indication can be one or more colors.In addition, the opening and closing time by controlling light source 11 makes illumination light pulse be applied to all or part of of the look section of this predetermined color.Certainly, those skilled in the art can expect the light pulse obtaining this predetermined color by other means completely, such as an optical filter (not shown) is set between colour wheel 13 and light-modulating cell 17, the light of this this predetermined color of filter transmission also stops (such as, absorb or reflection) light of other colors, and then the light pulse of predetermined color can be obtained equally.
Multiple light pulses of this predetermined color incide light-modulating cell 17 via relay lens 15 and prism 16.Light-modulating cell 17 can be the various suitable optic modulating device such as MEMS (micro electro mechanical system) (MEMS) and liquid crystal display (LCD or LCos).Light-modulating cell 17 comprises the controlled pixel cell of multiple independence, such as micro-galvanometer unit or liquid crystal cells, each pixel cell can be modulated the light through this pixel cell according to the modulating pulse of corresponding form, and its concrete modulation system is general knowledge known in this field, does not repeat them here.
For in normal procedure for displaying, light source 11 produces periodic continuous multicolor light pulse sequence, such as red, green, blue, white ... and light-modulating cell 17 determines the time of arrival of the light pulse of shades of colour by synchronizing pulse and color wheel delay time, and the light pulse arrived is modulated, at the upper image periodically forming shades of colour of screen (sign), and final dependence human eye combined color image.Such as, light-modulating cell 17 obtains R, G, B tri-kinds of picture signals successively, these three kinds of picture signals represent the grey decision-making of the pixel that the different coordinate figures in the image of red, green, blue three kinds of colors are corresponding respectively, and such as, grey decision-making in 3 × 3 pixel regions of R picture signal is as shown in table 1 below:
Table 1:
As shown in Table 1, wherein X0-X2 represents the row coordinate of image, and Y0-Y2 represents the row-coordinate of image, and numerical value then represents the grey decision-making of the pixel that above-mentioned coordinate is corresponding.Light-modulating cell 17, according to the above-mentioned grey decision-making of each pixel, produces one group of modulating pulse, and then controls the pixel cell corresponding to above-mentioned each pixel in light-modulating cell 17 respectively and carry out corresponding action.Such as, for MEMS (micro electro mechanical system), light-modulating cell 17 produces one group of modulating pulse according to the grey decision-making of pixel each in above-mentioned picture signal, control thus and grey decision-making be 255 micro-galvanometer unit corresponding to each pixel overturn 255 times, control with grey decision-making be 200 micro-galvanometer unit corresponding to each pixel overturn 200 times, control and grey decision-making be 20 micro-galvanometer unit corresponding to each pixel overturn 20 times etc.And then, the different grey decision-making of each pixel on image can be realized by the control of each pixel cell to light-modulating cell 17.
In the adjustment process of color wheel delay, light-modulating cell 17 obtains a picture signal, and this picture signal is the signal of the light pulse display predetermined image that can utilize this predetermined color.Such as, this picture signal to utilize the light pulse of this predetermined color with the signal of the consistent monochrome image of maximum brightness full screen display brightness, as shown in table 2 below:
Table 2:
As above, shown in table 2, in above-mentioned picture signal, the grey decision-making of each pixel is 255.Certainly, those skilled in the art can adopt other forms of picture signal completely, and such as, picture signal shown in table 1, the present invention does not impose any restrictions this.
Light-modulating cell 17 produces according to this picture signal, above-mentioned multiple synchronizing pulse and multiple candidate's color wheel delay time and organizes modulating pulse more, and modulates multiple light pulses of this predetermined color respectively according to this many groups modulating pulse.As indicated above, wherein often organize modulating pulse and comprise multiple modulating pulse respectively, each modulating pulse is modulated the light through this pixel cell for the pixel cell controlled in light-modulating cell 17.Such as, each pixel cell controlled in light-modulating cell 17 according to the grey decision-making of each pixel in above-mentioned picture signal carries out corresponding action.Wherein, when adopting the picture signal shown in MEMS (micro electro mechanical system) and table 2, light-modulating cell 17 controls its whole micro-galvanometer unit and overturns 255 times respectively.
Second probe unit 18 detects the luminous flux of multiple light pulses after light-modulating cell 17 is modulated of this predetermined color respectively.Light-modulating cell 17 determines best colour wheel time delay according to the luminous flux of the light pulse of predetermined color corresponding to each candidate's color wheel delay time.In the present embodiment, second probe unit 18 can be arranged at the optional position in the subsequent optical path of light-modulating cell 17, such as, be arranged between the second probe unit 18 and prism 16, between prism 16 and camera lens 19, between camera lens 19 and screen and on screen, only need the second probe unit 18 can detect the luminous flux of the light pulse of this predetermined color after light-modulating cell 17 is modulated, and after detecting this luminous flux by this luminous flux feedback to light-modulating cell 17.In addition, optical filter (not shown) before projection arrangement 10 can further include and is arranged at the second probe unit 18, the light of this this predetermined color of filter transmission also stops the light of other colors, and then improve the signal to noise ratio (S/N ratio) of the second probe unit 18.
In the present embodiment, light-modulating cell 17 comprises the second storage unit (not shown) further.This second cell stores one original color wheel delay time.This original color wheel delay time can be the color wheel delay time of the setting when assembling projection arrangement 10 or the color wheel delay time after adjustment process adjustment last time.In this adjustment process, light-modulating cell 17 obtains the original color wheel delay time from the second storage unit, and by carrying out increasing or decreasing to the original color wheel delay time, to form multiple candidate's color wheel delay time.Such as, specifically, light-modulating cell 17 can obtain this original color wheel delay time as candidate's color wheel delay time from the second storage unit, and after receiving synchronizing pulse, postpone this original color wheel delay time export this picture signal and predetermined hold-time, and then the one group of modulating pulse produced as shown in Figure 2, modulate to control the light pulse of light-modulating cell 17 to this predetermined color received.In fig. 2, each pulse waveform of each lines all represents one group of modulating pulse, and this group modulating pulse is actual can comprise multiple modulating pulse.Such as, solid line represents three groups of modulating pulses that delay is suitable, namely the generation time often organizing modulating pulse is synchronous with the generation time of corresponding light pulse respectively, article one, dotted line represents the three groups of modulating pulses postponing deficiency, namely the generation time of generation time early than the light pulse of correspondence of modulating pulse is often organized, and another dotted line represents three groups of modulating pulses that delay is excessive, the generation time namely often organizing modulating pulse is later than the generation time of corresponding light pulse.Those skilled in the art should understand that, three groups of modulating pulses that above-mentioned three kinds of lines represent respectively are not produce simultaneously, but do not producing according to different candidate's color wheel delay time in the same time, be only to show conveniently in fig. 2, and by three kinds of stick figures together.In a preferred embodiment, each group duration of modulating pulse is identical with the duration of the light pulse of this predetermined color.
Second probe unit 18 detects the luminous flux of the light pulse of the predetermined color after light-modulating cell 17 is modulated, and records this luminous flux.Subsequently, with predetermined step-length, this original color wheel delay time is progressively increased or successively decreased, to form new candidate's color wheel delay time, and after receiving another synchronizing pulse, postpone this new candidate's color wheel delay time export this picture signal and predetermined hold-time, produce another group modulating pulse, modulate to control light-modulating cell 17 another light pulse to this predetermined color received.Second probe unit 18 detects the luminous flux of another light pulse of this predetermined color after light-modulating cell 17 is modulated again, records this luminous flux.Subsequently, repeat said process, the luminous flux of multiple light pulses after modulation of this predetermined color can be obtained.
In other embodiments, multiple candidate's color wheel delay time can generate in advance, and is stored in the second storage unit.In the adjustment process of color wheel delay, light-modulating cell 17 directly transfers the plurality of candidate's color wheel delay time successively from the second storage unit.After obtaining candidate's color wheel delay time, to produce the specific implementation of modulating pulse identical with normal procedure for displaying according to the light pulse of this predetermined color can be utilized to show the picture signal of predetermined image, synchronizing pulse and candidate's color wheel delay time for light-modulating cell 17, and be techniques well known.
A cycle of operation that can not be greater than colour wheel 13 is differed due to original color wheel delay time and correct color wheel delay time, therefore the temporal summation that increases progressively the original color wheel delay time of light-modulating cell 17 or the temporal summation of successively decreasing preferably are not more than a cycle of operation of colour wheel 17, and then guarantee to obtain the correct color wheel delay time.
In the present embodiment, as shown in Figure 2, if the light pulse of predetermined color that colour wheel 13 produces and light-modulating cell 17 produce certain organize between modulating pulse more synchronous, the luminous flux of the light pulse of the predetermined color then after light-modulating cell 17 is modulated can be higher, three groups of modulating pulses such as, in Fig. 2 represented by solid line.Therefore, candidate's color wheel delay time corresponding to light pulse of the predetermined color that light-modulating cell 17 selective light flux is maximum is as best colour wheel time delay.The concrete deterministic process of light-modulating cell 17 will hereafter be described in detail.
After acquisition best colour wheel time delay, best colour wheel is stored into the second storage unit time delay by light-modulating cell 17 further, and replaces the original color wheel delay time.When projection arrangement 10 normally works, light-modulating cell 17 utilizes this best colour wheel to coordinate synchronizing pulse to modulate the colorama pulse train that colour wheel 13 generates time delay.Further, this best colour wheel to be further used as the original color wheel delay time in adjustment process next time time delay.
See the process flow diagram of a preferred embodiment of the color wheel delay time adjusting method of Fig. 3, Fig. 3 projection arrangement of the present invention.The method of adjustment of the color wheel delay time of projection arrangement of the present invention comprises:
In step S01, at least two the look sections controlling colour wheel 13 in turn and be periodically arranged at light source 11 go out on light path, and detect the position of colour wheel 13, to produce the multiple synchronizing pulses identical with colour wheel 13 period of motion, the look section simultaneously controlling the predetermined color of colour wheel 13 produces the light pulse of multiple predetermined color under the effect of light source 11.
In step S01, colour wheel 13 assorted section in turn and be periodically arranged at light source 11 go out in the process of light path, utilize the position of the first probe unit 14 pairs of colour wheels 13 to detect, and produce multiple synchronizing pulses as shown in Figure 2.Such as, utilize the first probe unit 14 can to detect the mark be attached in colour wheel 13 or CD-ROM drive motor rotating shaft, and produce a synchronizing pulse after detecting this mark at every turn, and then produce multiple synchronizing pulse, and the cycle of the plurality of synchronizing pulse is identical with the running period of colour wheel 13.
In addition, in step S01, the synchronizing pulse that first probe unit 14 produces is input to light source 11, under the effect of light source 11, produce multiple light pulses of predetermined color with the look section controlling the predetermined color of colour wheel 12, and the cycle of the plurality of light pulse is identical with the running period of colour wheel 13.Specifically, control light source 11 when the look section of this predetermined color according to synchronizing pulse determination colour wheel 13 is arranged at going out on light path of light source 11 and produce an illumination light pulse, with the light pulse making this illumination light pulse form predetermined color after the look section effect of this predetermined color, and then be periodically arranged at the multiple light pulses in the process of light path to produce predetermined color of light source 11 in the look section of this predetermined color.
In the present embodiment, because light source 11 is semiconductor laser light resource, it has the function of High Speed Modulation, therefore can switch or adjustment brightness rapidly in time.Therefore, the present embodiment produces illumination light pulse by the opening and closing controlling light source 11.Wherein, there is the first fixed delay time between the time going out light path that the look section of light source 11 time and this predetermined color of receiving synchronizing pulse moves into light source 11.This first fixed delay time can be stored in first storage unit (not shown) of light source 11.Meanwhile, there is the second fixed delay time between the time going out light path that the look section of time and this predetermined color that light source 11 receives synchronizing pulse shifts out light source 11, and be stored in this first storage unit equally.First fixed delay time and the second fixed delay time can be determined by the rotating speed of the position of the look section of this predetermined color, angle and colour wheel 13, and obtain by calculating.Therefore, after receiving synchronizing pulse, determine that the look section of this predetermined color moves into and shifts out the time light path of light source 11 according to the first fixed delay time of this first memory cell storage and the second fixed delay time, and open at the light path time control light source 11 that goes out of the look section immigration light source 11 of this predetermined color, the light path time control light source 11 that goes out shifting out light source 11 in the look section of this predetermined color is closed.Thus, when the look section of this predetermined color is arranged at going out on light path of light source 11, light source 11 just produces an illumination light pulse, and this illumination light pulse becomes the light pulse of a predetermined color through the look section wavelength convert of this predetermined color, and then form multiple light pulses of predetermined color as shown in Figure 2.
In a preferred embodiment, control light source 11 the look section of this predetermined color cover completely light source 11 go out light path time open, and control light source 11 the look section part of this predetermined color shift out light source 11 go out light path time close, the hot spot that the illumination light pulse making light source 11 produce thus produces on colour wheel 13 acts in the look section of this predetermined color completely, avoids other color of light that this hot spot produces when being applied to the look section of other colors to the impact of adjustment result.
In other embodiments, the emitting brightness of light source 11 can be adjusted according to synchronizing pulse, emitting brightness when being arranged at going out on light path of light source 11 with the look section making the emitting brightness of the light source 11 when the look section of this predetermined color is arranged at going out on light path of light source 11 obviously be different from other colors, and then produce above-mentioned illumination light pulse equally.
In the present embodiment, the predetermined color of indication can be one or more colors.In addition, the opening and closing time by controlling light source 11 makes illumination light pulse be applied to all or part of of the look section of this predetermined color.Certainly, those skilled in the art can expect the light pulse obtaining this predetermined color by other means completely, such as an optical filter (not shown) is set between colour wheel 13 and light-modulating cell 17, the light of this this predetermined color of filter transmission also stops (such as, absorb or reflection) light of other colors, and then the light pulse of this predetermined color can be obtained equally.
In step S02, show the picture signal of predetermined image, the plurality of synchronizing pulse and the generation of multiple candidate's color wheel delay time according to the light pulse of this predetermined color can be utilized and organize modulating pulse more, respectively multiple light pulses of this predetermined color are modulated according to this many groups modulating pulse, and detect the luminous flux of multiple light pulses of this predetermined color after modulation respectively, and determine best colour wheel time delay according to luminous flux.
Specifically, in step S02, control light-modulating cell 17 and obtain a picture signal, this picture signal is the signal of the light pulse display predetermined image that can utilize this predetermined color.Such as, this picture signal is the light pulse that can control this predetermined color as above shown in table 2 with the signal of the consistent monochrome image of maximum brightness full screen display brightness.
Control light-modulating cell 17 and organize modulating pulse according to this picture signal, the plurality of synchronizing pulse and the generation of multiple candidate's color wheel delay time more, and respectively multiple light pulses of this predetermined color are modulated according to this many groups modulating pulse.As described above, wherein often organize modulating pulse and comprise multiple modulating pulse respectively, each modulating pulse is modulated the light through this pixel cell for the pixel cell controlled in light-modulating cell 17.Such as, each pixel cell controlled in light-modulating cell 17 according to the grey decision-making of each pixel in above-mentioned picture signal carries out corresponding action.Wherein, when adopting the picture signal shown in MEMS (micro electro mechanical system) and table 2, light-modulating cell 17 controls its whole micro-galvanometer and overturns 255 times respectively.
Control the luminous flux of multiple light pulses after light-modulating cell 17 is modulated that the second probe unit 18 detects this predetermined color respectively.Further, control light-modulating cell 17 and determine best colour wheel time delay according to the luminous flux of the light pulse of predetermined color corresponding to each candidate's color wheel delay time.In the present embodiment, second probe unit 18 can be arranged at the optional position in the subsequent optical path of light-modulating cell 17, such as, be arranged between the second probe unit 18 and prism 16, between prism 16 and camera lens 19, between camera lens 19 and screen and on screen, only need the second probe unit 18 after the luminous flux of light pulse detecting the predetermined color after light-modulating cell 17 is modulated by luminous flux feedback to light-modulating cell 17.In addition, can also arrange optical filter (not shown) further before the second probe unit 18, the light of this this predetermined color of filter transmission also stops the light of other colors, and then improve the signal to noise ratio (S/N ratio) of the second probe unit 18.
In the present embodiment, light-modulating cell 17 comprises the second storage unit (not shown) further.This second cell stores one original color wheel delay time.This original color wheel delay time can be the color wheel delay time of the setting when assembling projection arrangement 10 or the color wheel delay time after adjustment process adjustment last time.In this adjustment process, control light-modulating cell 17 and obtain the original color wheel delay time from the second storage unit, and by carrying out increasing or decreasing to the original color wheel delay time, to form multiple candidate's color wheel delay time.Specifically, control light-modulating cell 17 and obtain this original color wheel delay time from the second storage unit, and after light-modulating cell 17 receives synchronizing pulse, postpone this original color wheel delay time export this picture signal and predetermined hold-time, and then the one group of modulating pulse produced as shown in Figure 2, modulate to control the light pulse of light-modulating cell 17 to the predetermined color received.In fig. 2, a pulse pattern is utilized to represent one group of modulating pulse.In a preferred embodiment, the duration of this group modulating pulse is identical with the duration of the light pulse of this predetermined color.
Control the luminous flux that the second probe unit 18 detects the light pulse of the predetermined color after light-modulating cell 17 is modulated, and record this luminous flux.Subsequently, with predetermined step-length, this original color wheel delay time is progressively increased or successively decreased, to form new candidate's color wheel delay time, and after receiving another synchronizing pulse, postpone this new candidate's color wheel delay time export this picture signal and predetermined hold-time, produce another group modulating pulse, modulate to control light-modulating cell 17 another light pulse to this predetermined color received.Control the luminous flux that the second probe unit 18 detects another light pulse of this predetermined color after light-modulating cell 17 is modulated again, record this luminous flux.Subsequently, repeat said process, the luminous flux of multiple light pulses after modulation of this predetermined color can be obtained.
A cycle of operation that can not be greater than colour wheel 13 is differed due to original color wheel delay time and correct color wheel delay time, therefore the temporal summation that increases progressively the original color wheel delay time of light-modulating cell 17 or the temporal summation of successively decreasing preferably are not more than a cycle of operation of colour wheel 17, and then guarantee to obtain the correct color wheel delay time.
In the present embodiment, as shown in Figure 2, if the light pulse of predetermined color that produces of colour wheel 13 and light-modulating cell 17 produces certain organize between modulating pulse more synchronous, then the luminous flux of the light pulse of the predetermined color after light-modulating cell 17 modulation can be higher.Therefore, in step S02, the candidate's color wheel delay time corresponding to light pulse controlling the maximum predetermined color of light-modulating cell 17 selective light flux is as best colour wheel time delay.The concrete deterministic process of light-modulating cell 17 will hereafter be described in detail.
After acquisition best colour wheel time delay, control light-modulating cell 17 further and best colour wheel is stored into the second storage unit time delay, and replace the original color wheel delay time.When projection arrangement 10 normally works, light-modulating cell 17 utilizes this best colour wheel to coordinate synchronizing pulse to modulate the colorama pulse train that colour wheel 13 generates time delay.Further, this best colour wheel to be further used as the original color wheel delay time in adjustment process next time time delay.
It is the process flow diagram of a concrete methods of realizing of the step S02 shown in Fig. 3 see Fig. 4, Fig. 4.
In the step s 21, obtain the alternatively color wheel delay time original color wheel delay time, and utilize the first variable t and the second variable t1 to record this original color wheel delay time.This original color wheel delay time can be when assembling projection arrangement color wheel delay time of arranging or the color wheel delay time after adjustment process adjustment last time, and to be preferably stored in predetermined second storage unit.
In step S22, produce one group of modulating pulse according to picture signal, synchronizing pulse and original color wheel delay time, to modulate the light pulse of predetermined color, its concrete modulated process as described above, does not repeat them here.
In step S23, detect the luminous flux of the light pulse of the predetermined color after step S22 modulation, and utilize ternary P0 to record this luminous flux.
In step s 24 which, with predetermined step-length △ T, the first variable t is increased progressively, to obtain new candidate's color wheel delay time, and produce one group of new modulating pulse, to modulate the light pulse of predetermined color according to picture signal, synchronizing pulse and this new candidate's color wheel delay time.Step S24 is identical with the picture signal in step S22.
In step s 25, detect the luminous flux of the light pulse of the predetermined color after step S24 modulation, and utilize the 4th variable P1 to record this luminous flux.
In step S26, judge whether the 4th variable P1 is less than ternary P0.If P1 is less than P0, then enter step S28, if P1 is greater than P0, then enter step S27.
In step s 27, make P0=P1, and utilize the second variable t1 to record the first variable t, and enter step S28 subsequently.
In step S28, judge whether the first variable t is less than threshold value T, if be less than threshold value T, enters step S24, and then repeat step S24-S27, otherwise enter step S29.In this step, threshold value T determined jointly by the adjustment interval (temporal summation increase progressively the original color wheel delay time) of original color wheel delay time and original color wheel delay time.Such as, threshold value T can equal the original color wheel delay time and adds the colour wheel cycle of operation.
In step S29, store the second variable t1 as best colour wheel time delay.
In said method, by obtaining the original color wheel delay time and being increased progressively to the multiple candidate's color wheel delay times obtaining and comprise the original color wheel delay time the original color wheel delay time, and produce one group of modulating pulse light pulse to predetermined color respectively according to picture signal, synchronizing pulse and each candidate's color wheel delay time and modulate, and the luminous flux of the light pulse of each predetermined color of detection after modulation.Subsequently, the candidate's color wheel delay time selecting corresponding luminous flux maximum is as best colour wheel time delay.
It should be noted that and also can obtain multiple candidate's color wheel delay time by successively decreasing to the original color wheel delay time in the above-mentioned methods.Further, can also increase by a variable in step s 24 which and step-length △ T is added up, now this variable and another predetermined threshold can be compared in step S28.Now, this another predetermined threshold is directly determined by the adjustment interval of original color wheel delay time, such as, equal the colour wheel cycle of operation.In addition, those skilled in the art can design other completely and specifically judge that flow process determines best colour wheel time delay according to description above.
In above process, first can also increase (reduction) original color wheel delay time, if the luminous flux detected increases, then continue to increase (reduction) original color wheel delay time, until reducing appears in luminous flux, then adjustment process terminates, and gets color wheel delay time corresponding to highlight flux as best colour wheel time delay.After reduction appears in luminous flux, also can reduce (increase) original delay time, after oppositely regulating, terminate adjustment process again.If luminous flux just reduces at the beginning, then reduce (increase) original delay time at once, oppositely regulate.
The method of adjustment of projection arrangement of the present invention and color wheel delay time thereof produced according to picture signal, multiple synchronizing pulse and multiple candidate's color wheel delay time organizes modulating pulse more, modulate according to the light pulse of many group modulating pulses to predetermined color, and detect the luminous flux of the light pulse of this predetermined color respectively, and determine best colour wheel time delay according to the luminous flux detected.Therefore, projection arrangement of the present invention and color wheel delay time adjusting method thereof can realize in robotization, and have save time, laborsaving and Adjustment precision advantages of higher.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize instructions of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (19)
1. a projection arrangement, is characterized in that, described projection arrangement comprises:
Light source is semiconductor laser light resource, comprises the first storage unit, and described light source has one and goes out light path;
Colour wheel, described colour wheel comprises at least two look sections, and each described look section is in turn and go out on light path, with the light pulse making the look section of the predetermined color of described colour wheel produce described predetermined color under the effect of described light source described in being periodically arranged at;
First probe unit, for detecting the position of described colour wheel, and produce the multiple synchronizing pulses identical with the described colour wheel period of motion, the first fixed delay time is there is between the time going out light path that the look section of time and this predetermined color that described light source receives synchronizing pulse moves into described light source, the second fixed delay time is there is between the time going out light path that the look section of time and this predetermined color that described light source receives synchronizing pulse shifts out described light source, this first fixed delay time and the second fixed delay time are stored in described first storage unit, according to described first fixed delay time, the switch of the second fixed delay time and multiple synchronized-pulse control light source or modulated light source brightness,
Light-modulating cell, for obtaining picture signal, produce according to described picture signal, described multiple synchronizing pulse and multiple candidate's color wheel delay time and organize modulating pulse more, and respectively the light pulse of described predetermined color is modulated according to the modulating pulse of described many groups, described picture signal is the signal of the light pulse display predetermined image that can utilize described predetermined color;
Second probe unit, for detecting the luminous flux of the light pulse of the described predetermined color after described light-modulating cell modulation respectively, and gives described light-modulating cell by the luminous flux feedback of the light pulse of described predetermined color;
Wherein, described light-modulating cell determines best colour wheel time delay according to described luminous flux.
2. projection arrangement according to claim 1, is characterized in that, described second probe unit is arranged in the subsequent optical path of described light-modulating cell.
3. projection arrangement according to claim 1, is characterized in that, described projection arrangement comprises the optical filter before being arranged at described second probe unit, and the light of predetermined color described in described filter transmission also stops the light of other colors.
4. projection arrangement according to claim 1, is characterized in that, the described candidate's color wheel delay time corresponding to the light pulse of the described predetermined color that described light-modulating cell selects described luminous flux maximum is as described best colour wheel time delay.
5. projection arrangement according to claim 1, it is characterized in that, described light source determine according to described synchronizing pulse the look section of described predetermined color be arranged at described in go out on light path time produce an illumination light pulse, with the light pulse making described illumination light pulse form described predetermined color after the look section effect of described predetermined color.
6. projection arrangement according to claim 5, is characterized in that, described light source is opened when going out light path described in the look section of described predetermined color moves into, and closes when going out light path described in the look section of described predetermined color shifts out.
7. projection arrangement according to claim 6, is characterized in that, described light source is opened when going out light path described in the look section of described predetermined color covers completely, and closes when going out light path described in the look section part of described predetermined color shifts out.
8. projection arrangement according to claim 5, is characterized in that, described illumination light pulse wavelength convert is become the light pulse of described predetermined color by the look section of described predetermined color.
9. projection arrangement according to claim 1, is characterized in that, described projection arrangement comprises the optical filter be arranged between described colour wheel and described light-modulating cell, and the light of predetermined color described in described filter transmission also stops the light of other colors.
10. projection arrangement according to claim 1, it is characterized in that, described light-modulating cell comprises the second storage unit, the described second cell stores one original color wheel delay time, described light-modulating cell obtains the described original color wheel delay time from described second storage unit and carries out increasing or decreasing to the described original color wheel delay time, to form described multiple candidate's color wheel delay time.
11. projection arrangements according to claim 10, is characterized in that, the temporal summation that described light-modulating cell increased progressively the described original color wheel delay time or the temporal summation of successively decreasing are not more than the cycle of operation of described colour wheel.
12. projection arrangements according to claim 10, is characterized in that, described best colour wheel is stored into described second storage unit time delay by described light-modulating cell, and replaces the described original color wheel delay time.
The method of adjustment of the color wheel delay time of 13. 1 kinds of projection arrangements, is characterized in that, described method of adjustment comprises:
At least two the look sections controlling colour wheel in turn and be periodically arranged at LASER Light Source go out on light path, and detect the position of described colour wheel, to produce the multiple synchronizing pulses identical with the described colour wheel period of motion, and the look section controlling the predetermined color of described colour wheel produces the light pulse of described predetermined color under the effect of described LASER Light Source
The first fixed delay time is there is between the time going out light path that the look section of time and this predetermined color that described LASER Light Source receives synchronizing pulse moves into described light source, the second fixed delay time is there is between the time going out light path that the look section of time and this predetermined color that described light source receives synchronizing pulse shifts out described light source, this first fixed delay time and the second fixed delay time are stored in the first storage unit of described light source, according to described first fixed delay time, the switch of the second fixed delay time and multiple synchronized-pulse control light source or modulated light source brightness,
Show the picture signal of predetermined image, described multiple synchronizing pulse and the generation of multiple candidate's color wheel delay time according to the light pulse of described predetermined color can be utilized and organize modulating pulse more, respectively the described light pulse of described predetermined color is modulated according to the modulating pulse of described many groups, and detect the luminous flux of described light pulse of the described predetermined color after modulation respectively, the luminous flux feedback of the light pulse of described predetermined color is determined best colour wheel time delay to light-modulating cell according to described luminous flux.
14. methods of adjustment according to claim 13, is characterized in that, the step that the look section of the predetermined color of the described colour wheel of described control produces the light pulse of described predetermined color under the effect of described light source comprises:
Determine according to described synchronizing pulse the look section of described predetermined color be arranged at described in go out on light path time control described light source and produce an illumination light pulse, with the light pulse making described illumination light pulse form described predetermined color after the look section effect of described predetermined color.
15. methods of adjustment according to claim 14, is characterized in that, described determine according to described synchronizing pulse the look section of described predetermined color be arranged at described in go out on light path time control the step that described light source produces an illumination light pulse and comprise:
Control described light source to open when going out light path described in the look section of described predetermined color moves into, and close when going out light path described in the look section of described predetermined color shifts out.
16. method of adjustment according to claim 15, is characterized in that, the described light source of described control is opened when going out light path described in the look section of described predetermined color moves into, and the step of closing when going out light path described in the look section of described predetermined color shifts out comprises:
Control described light source to open when going out light path described in the look section of described predetermined color covers completely, and close when going out light path described in the look section part of described predetermined color shifts out.
17. methods of adjustment according to claim 13, is characterized in that, describedly determine that the step of best colour wheel time delay comprises according to described luminous flux:
Described candidate's color wheel delay time corresponding to the light pulse of the described predetermined color selecting described luminous flux maximum is as described best colour wheel time delay.
18. methods of adjustment according to claim 13, it is characterized in that, the step that described basis can utilize the picture signal of the light pulse of described predetermined color display predetermined image, described multiple synchronizing pulse and multiple candidate's color wheel delay time to produce the modulating pulse of many groups comprises:
Obtain the original color wheel delay time and increasing or decreasing is carried out to the described original color wheel delay time, to form described multiple candidate's color wheel delay time.
19. methods of adjustment according to claim 18, is characterized in that, the temporal summation increase progressively the described original color wheel delay time or the temporal summation of successively decreased are not more than the cycle of operation of described colour wheel.
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| US10260709B2 (en) | 2015-11-04 | 2019-04-16 | Hisense Co., Ltd. | Laser light source, method for controlling dual color wheels of light source, and laser projection device |
| US10006610B2 (en) | 2015-11-04 | 2018-06-26 | Hisnese Co., Ltd. | Laser light source, method for controlling dual color wheels of light source, and laser projection device |
| CN105824178B (en) * | 2015-11-04 | 2017-12-15 | 海信集团有限公司 | The double-colored wheel synchronisation control means of light source |
| CN106842786B (en) * | 2015-12-07 | 2021-07-06 | 深圳光峰科技股份有限公司 | Laser projection equipment |
| CN105654875B (en) * | 2016-03-29 | 2018-12-21 | 海信集团有限公司 | A kind of laser projection display method and device |
| WO2018094696A1 (en) * | 2016-11-25 | 2018-05-31 | 深圳迈瑞生物医疗电子股份有限公司 | Endoscope system, and light source device thereof |
| CN108601504A (en) * | 2016-11-25 | 2018-09-28 | 深圳迈瑞生物医疗电子股份有限公司 | A kind of endoscopic system and its control method |
| JP6547086B2 (en) * | 2017-02-23 | 2019-07-17 | 富士フイルム株式会社 | Projection display device, control method for projection display device, control program for projection display device |
| CN110545411B (en) * | 2018-05-29 | 2021-06-15 | 中强光电股份有限公司 | Projector, projection system and detection method of transmission delay thereof |
| CN111491145B (en) * | 2019-01-29 | 2022-12-16 | 深圳光峰科技股份有限公司 | Driving device, light source system and display equipment |
| CN115706785A (en) * | 2021-08-04 | 2023-02-17 | Oppo广东移动通信有限公司 | Projection method, device and system and non-volatile computer readable storage medium |
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